There's a concept spreading around coaching circles to combat an increasingly individualistic culture in amateur baseball: Mudita.
While there's no direct English word to match the Buddhist term, there's certainly an example: Adley Rutschman.
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"It's basically the expression of joy in other people's accomplishments," said Joe Taylor, who coached Rutschman’s summer-ball teams with Portland Baseball Club while the Orioles’ No. 1 draft pick was in high school. "So, basically unselfishness and just a love for your teammates. That's the one thing: He has so much fun, and he has so much fun seeing his teammates be successful.